Causes And Corrective Actions - Mitsubishi Electric FR-A700 Instruction Manual

Troubleshooting
7.2

Causes and corrective actions

Error Message
A message regarding operational troubles is displayed. Output is not shutoff.
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Corrective action
FR-A700 EC
HOLD
Operation panel lock
Operation lock mode is set. Operation other than STOP/RESET is made invalid. (Refer to
section 4.3.3.)
—
Press the MODE key for 2s to release lock.
Er1
Write disable error
1) You attempted to make parameter setting when Pr. 77 Parameter write selection has
been set to disable parameter write.
2) Frequency jump setting range overlapped.
3) Adjustable 5 points V/F settings overlapped
4) The PU and inverter cannot make normal communication.
1) Check the setting of Pr. 77 "Parameter write selection" (Refer to section 6.21.2.)
2) Check the settings of Pr. 31 to 36 (frequency jump). (Refer to section 6.8.2.)
3) Check the settings of Pr. 100 to Pr. 109 (Adjustable 5 points V/F). (Refer to section
6.9.4.)
4) Check the connection of the PU and inverter.
Er2
Write error during operation
When parameter write was performed during operation with a value other than "2" (writing
is enabled independently of operation status in any operation mode) is set in Pr. 77 and the
STF (STR) is on.
1) Check the Pr. 77 setting. (Refer to section 6.21.2.)
2) Check that the inverter is not operating.
1) Set "2" in Pr. 77.
2) After stopping operation, make parameter setting.
Er3
Calibration error
Analog input bias and gain calibration values are too close.
Check the settings of C3, C4, C6 and C7 (calibration functions). (Refer to section 6.20.5.)
Causes and corrective actions
7 - 5